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CVE-2026-118128— a2aproject a2a-js Task Status Update result_manager.ts ResultManager.applyStatusUpdate race condition

Quick assessment

Affected
a2aproject a2a-js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 a2aproject 的 a2a-js 组件（版本 1.1.0 及以下）中发现了一个安全漏洞。该漏洞影响位于 文件中的 函数，该函数属于“任务状态更新处理程序”组件。攻击者可通过远程方式利用此漏洞，导致竞态条件（race condition）。建议将受影响组件升级至 1.2.0 版本以修复此问题。相关修复补丁的提交哈希为 。强烈建议及时升级受影响的组件。

CVSS 6.5 · Medium EPSS 0.36% · P29

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
a2aproject a2a-js 1.0 affected
1.1.0 affected
1.2.0 unaffected
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I. Basic Information for CVE-2026-118128

Vulnerability Information
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Vulnerability Title
a2aproject a2a-js Task Status Update result_manager.ts ResultManager.applyStatusUpdate race condition
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in a2aproject a2a-js up to 1.1.0. Impacted is the function ResultManager.applyStatusUpdate of the file src/server/result_manager.ts of the component Task Status Update Handler. Such manipulation leads to race condition. The attack may be launched remotely. Upgrading to version 1.2.0 is recommended to address this issue. The name of the patch is 7b87c9480bfa643f9d2b2eaf06988b3d3a95de25. It is recommended to upgrade the affected component.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
a2aproject a2a-js 1.0 cpe:2.3:a:a2aproject:a2a-js:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-118128

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III. Intelligence Information for CVE-2026-118128

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Patches & Fixes for CVE-2026-118128 (2)

Vendor Pages for CVE-2026-118128 (1)

Same Patch Batch · a2aproject · 2026-10-27 · 6 CVEs total

CVE-2026-117507 5.4 MEDIUM a2aproject a2a-java TaskManager.saveTaskEvent race condition
CVE-2026-117503 5.3 MEDIUM a2aproject a2a-go REST SSE handler rest.go resource consumption
CVE-2026-117504 5.3 MEDIUM a2aproject a2a-go Distributed Manager distributed_manager.go Cancel denial of service
CVE-2026-117505 4.3 MEDIUM a2aproject a2a-java ChildQueue queue.offer resource consumption
CVE-2026-117506 4.3 MEDIUM a2aproject a2a-java Push Notification Config Store JpaDatabasePushNotificationConfigStore.

IV. Related Vulnerabilities

Same vendor: a2aproject
Same weakness: CWE-362